Sun Microsystems Enterprise 250 Owner's Manual page 118

The system's disk cage features six green/yellow LED lights, each one located
adjacent to a disk bay. These LEDs indicate the operating status and any fault
conditions associated with each disk drive. This diagnostic feature helps the
administrator to quickly identify drives requiring service. For additional information
about disk drive LEDs, see "Disk LEDs" on page 260.
The following figure shows the system's six internal disk slots and LEDs. Disk slots
are numbered from 0 to 5.
Figure 5–7
The Solstice DiskSuite software supplied with the Solaris server media kit lets you
use internal disk drives in a variety of RAID configurations. RAID 0 (striping),
RAID 1 (mirroring), RAID 0+1 (striping plus mirroring), and RAID 5 (striping with
interleaved parity) are all supported. You can also configure drives as "hot spares."
For more information on RAID configurations, see "About Disk Array
Configurations and Concepts" on page 209.
The "hot-plug" feature of the system's internal disk drives allows the removal and
installation of drives while the system is operational. This capability significantly
reduces system down-time associated with disk drive replacement.
The hot-plug procedure involves software commands for preparing the system prior
to removing a disk drive and for reconfiguring the operating environment after
installing the replacement drive. The exact hot-plug procedure depends on which
version of the Solaris operating environment you are using. For the complete
procedure, please refer to Platform Notes: Sun Enterprise 250 Server, available on the
Sun Enterprise 250 Server Owner's Guide ♦ Revision A, June 1998
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